i used to think __ hard to learn english well.but i find __

i used to think __ hard to learn english well.but i find __ I still find _____ to hard to learn English well. i found __ very hard to learn english well(A:them b:it is c: always think __ important to learn english well. I think ____ to learn English well. I used to think__hard to learn English well.But I found __ea I find it useful to learn English well It is so hard to lear I think it hard to learn English well if we don't work hard i think [ ] hard to learn english well if we don't work hard I find it hard to learn English well.请讲解分析一下这个句子. I find it easy __(learn) English I think it to learn English well if we don'twork hard.的分析